Balanced valve



v p 1933- w. E. GOLDSBOROUGH 1,926,529

BALANCED VALVE ,Filed May 31, 192s:

W\ NDEF E. GOLDSBOROUGH 'Patentedesept- 1 v: 1326,52 9

g i BALANCED;VALVE V Winder Goldsberough, South Norwalk, 001111.,

assignor to. Doherty Research Company, New I York, N; Y., a corporaticn'of'Delaware I i Application May 31; 1928. Serial No. 281,812? Y a p g g"4. Claims; to em- 159) Thisinvention relatesto a valve for controllingpassage this high pressure would tend to press the flow of fluids underhigh pressure. the valve upwardly with great force, thereby sub- Ininternal combustionengines particularly of jecting the actuating,mechanism to'very severe the solid injection type and in some othertypes strains. The arrangement shown prevents such 5 of power plants itis necessary to supply fuel unstrains .and provides a substantiallybalanced 0 der high pressures ranging from 2000 to 10,000'lbs. reliefvalve while'in the open position. It is obor'more per sq. inch to acombustion chamber. vious that the actuating mechanism may act; Usuallythe supply to such engines is intermiteither uponstem l orupon stem lorupon both tent and the quantity of fuel supplied at each alternately andthat governor control means may injection must be preciselyregulated-Because of v be associatedwith such actuating mechanism for V the smallquantities of fuel handled at each inregulating the extent or the timeof lift of the r jection it is the usual practice to provide a pumpvalve in order to variably control the quantity having a larger capacitythan the charge used 'of fuel or other liquid supplied by the pump. andto by-pass the portion of the fuel not used, Suitable actuating andcontrol mechanisms are l5 controlling this action by some appropriateform well known in connection withliquid fuel pumps of valve. This valvemay be located between and need'not here be described. the pump and theengine cylinder or may be pro- It may readily be seen that valvesconstructed vided in the pump itself, either as'an additional inaccordance with my invention will also beusevalve or as a combinedsuction and by-pass valve. ful as distributing valves inthe comm-on railsys- Because of the high pressures to which such tem of fuel supply insolid injection engines.

. It is the objectof this invention to provide a movemententirelyWithout resistance of the presvalves are subjected it has been necessaryto pro i In the arrangement shown,.a small area formed vide very ruggedactuating mechanism to conby shoulder 2 is provided which is acted uponby trol them. It has been proposed to balance such the fuel or otherliquid in chambers. This tends valves against the high pressure in thefuel chamto keep the valve seated. Such area is not en 25 her but nosuch construction has been particutirely essential to the constructionandmay be larly successful in reducing the shock upon the omitted sothat the stem '1 will have the same actuating mechanism for the reasonthat as soon cross-sectional area throughout. I The valve as the valvewas moved it immediately became .would then be seated entirely by, theactuating unbalanced. mechanism and would be capable of upward valvewhich will be substantially balanced in sure in' chamber 4.. I-Iowever,va small pressure" both open and closed positions so thatthe actuarea, asshown,'is to be preferred It is underation thereof may be effectedwithout great strain, stood thatthe words substantially balanced in uponthe actuating mechanism. the following claims are intended to includeper- 3 5 The drawing isa sideelevation of the valve, fectbalance such asmay be attainedby omitpartly in section, showing the same closing theting the shoulder 2,]or by putting a shoulder sim by-pass passage,whichis shown in section. ilar to 2 on stem '7,'and by giving stems landReferring to the accompanying drawing:1 7 the same diameter.

indicates the stem of a relief valve, the shoulder 2 Whilemyfinventio'n-is particularly applicable 40 of which wh a ed D y the gPressure to fuel pumps of internal combustion engines it f th fu l Inpassage 4 felees the a ve against is obviously suited to the control of'fluidunderf its seat in a wall 3. The passage 4 may be either gpressure in other t ti the pump chamber or the fuel passage betweenHaving described the invention, What is V the pump and the enginecylinder. 5 indicatesa l i d as ew i 45 passage through which the excessfuel or other A va1ve for controlling the flow of liquids i fluid flowswhen the stem i lifted? Attached under high pressure comprising avalvestern, a t0 the e 1 by n Shank 6 Which is valve face forming theend ofsaid stem, a shoul; eelew-threaded thereto, is a second 1 7 e derforming a face of small area tending to move mg a a 3 Opposed to w e 9of the said valve toward its closed'position when acted When the fuelflows through the relief valve port upon bythe controlled liquid, asecond stem at- ,105

upon lifting of the stem 1 by the usual actuattached to the valve end ofsaid first mentioned J ing mechanism, the high pressure acts upon thestem and having a face opposed to said valve face. face 9 0f t valve Wit I101; the PDO- and exposed to the pressure ofthe liquid when siteface8 which is exposed to the flow of fuel th'evalve is open for limitingthe movement of the DIN passing at high velocity through the open .valvevalve when the same. is unseated. 9

2. In a device of the type described, a pressure chamber, a dischargepassagea wall having an orifice providing communication" between saidpressure chamber and said discharge passage,

a valve having a face coacting with'a seat sur-' rounding said orifice,a stem for said valve extending through said pressure chamber and hav- 7ing a shoulder thereon providing a surface of less I passage, having aface directly opposing said face area than theeffective cross-sectionalarea of said orifice, a second stemdetachably connecting to said valveextending through" said discharge and of larger diameter than thediameter of said chamber, avalve face forming the end of said stem andcontrolling said orifice, a second stem detachably connected to thevalve end of said first stem by a reduced portion extending through saidpassage and having an enlarged portion of a diameter greater than thatof said orifice surficiently close thereto to be exposed to the surgepressure of the liquid when the valve is open.

'4.- A valve mechanisrrifor controlling the flow 7 of fluid under highpressure, comprising a valve stem, a valve face-forming the end of saidstem, an orifice forming a double seat, one of which is controlled bysaid valve, a second stem attached to said valve end of said first stemand having a second valve 'fac'e opposed to said first valve face andcontrolling the second valve seat of said orifice, a shoulder forming aface of small area ionflsaidfirst mentioned stem above its valve,

whereby the valve automatically closes as soon as the liquid pressure isequalized around it.

i WINDER. E. GOLDSBORQUGI-I.

